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FYI, there are guys using deck spacers on the 500" Hemi99 to achieve 650+ ci. It may not be the best way to get there(as i understand it) but it does work.

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Do you know anybody who makes them?

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I might be able to find out, give me a couple days to look into it.

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I am considering utilizing the 5" Hemi 99 heads (I have access to about 3 sets) along w/ a CN Billet block to go 800", and then add 3 kits to it to really compete in Outlaw 10.5 in 2011....

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The one and only competitive nitrous player in Outlaw on the west coast uses a big Fulton motor with 5 stages.

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I am considering utilizing the 5" Hemi 99 heads (I have access to about 3 sets) along w/ a CN Billet block to go 800", and then add 3 kits to it to really compete in Outlaw 10.5 in 2011....

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The one and only competitive nitrous player in Outlaw on the west coast uses a big Fulton motor with 5 stages.

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Compete in ADRL or some other series in Outlaw 10.5?

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If money is no object then a NA engine would be a complete waiste of time . A full on Predator and a 99 are close around 550ish head flow I think . The ballpark for a 650 CID are 1300 Plus or minus 10 percent.

That 900+ Sonny engine for $90,000 is meant for heads up guys that are looking for the NA weight break .
I went a 7.40 @ 195 with 4600 feet of air last weekend ( acctualy 7.406 and a 7,413 back to back ) with 14 pounds of boost on the AMS 1000.

Making 1300 hp with a Indy head or a Edelbrock head can be done in a garage with a Procharger or a turbo . ( for a lot lesss that $90,000 )

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Guys lets be honest.



1500 with 650 inches is a tall order unless your pulling bearings every 3 passes and checking wrist pins? Not very economical for a bracket motor? i dont know that i have ever seen a car run numbers of 1500 horse NA?

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Yep, 1500 N/A is tremendous steam for any engine in the 650ci range.

Friends of mine have a killer backhalf 70' Cuda at just over 3000#. So far, it has been 7.50 @ 182 with a Torqueflite.

Its powered by a 550ci HEMI 99'. By todays standards, that is a small engine.

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I think I know who Jim is talking about and that is a 550" N/A 4.9"BS Hemi and he said that comes in at around 1450HP....and guess what, when you put it in the Wallace ET Calculator, it is dead on...7.50 @ 3300#'s

Keep in mind, the current 99 Hemi engine is going about 1460HP at 500" in AJ's car

1500HP @ 650" would be NO PROBLEM AT ALL for a '99 Hemi engine

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Has anyone ever built a motor that big with billet heads? I think the millinum heads are still cast right? What about some A. Johnson (fuel guy) or Ken Veney billet heads with big valves. I think they can go 2.6 intakes. Even BAE stuff has big valves.

I agree with go green, for the cash spent on NA you could build motor like Blown572darts and have 2500hp.

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Those heads are all 4.8 BS if i'm not mistaken. Nobody makes a 426 style hemi in bigger bore spaces, and those heads are all designed for forced induction. Plus the chambers(hemispherical)are to big requiring a heavy piston.

I know of a guy who has taken the millenium head as far as it could go and got nearly 700 ci from a mopar (much)raised block. even on huge loads nitrous he could not compete in pro mod. He(james Duncan)was unsucessful in getting Stage 5 or anyone else to make a 5.BS 426 style head..just not enuff demand he said. But he felt a 426 head THAT big COULD be competetive. Sadly no-one will probably ever know..sure would like to see it tried , tho.

Dont know if you could squeeza 2.6 valve on 4.8 BS. Sanchez heads(Total Flow) can go over 2.5 he says. This is from alan Johnsons site:

Chrysler-Hemi / Alcohol STG II

These heads are machined from billet 6061 T-6 aluminum, and provide the same air flow characteristics as their Top Fuel cousins. They are the first choice of many Alcohol Dragster and Funny Car teams. They are also very popular with Drag Boats, A-Gas, Nostalgia, and truck and tractor pulling competitors. Must be used with an AJPE supercharger manifold. They are 100% CNC ported, and come fully machined, ready for assembly with 2.400" x 1.950" diameter valves.


Standard Features Include:
100% CNC Porting
3/8" Diameter. Rocker Dowels
9/16" Stud Holes

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Has anyone ever built a motor that big with billet heads? I think the millinum heads are still cast right? What about some A. Johnson (fuel guy) or Ken Veney billet heads with big valves. I think they can go 2.6 intakes. Even BAE stuff has big valves.

I agree with go green, for the cash spent on NA you could build motor like Blown572darts and have 2500hp.

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Those heads are all 4.8 BS if i'm not mistaken. Nobody makes a 426 style hemi in bigger bore spaces, and those heads are all designed for forced induction. Plus the chambers(hemispherical)are to big requiring a heavy piston.

I know of a guy who has taken the millenium head as far as it could go and got nearly 700 ci from a mopar (much)raised block. even on huge loads nitrous he could not compete in pro mod. He(james Duncan)was unsucessful in getting Stage 5 or anyone else to make a 5.BS 426 style head..just not enuff demand he said. But he felt a 426 head THAT big COULD be competetive. Sadly no-one will probably ever know..sure would like to see it tried , tho.

Dont know if you could squeeza 2.6 valve on 4.8 BS. Sanchez heads(Total Flow) can go over 2.5 he says. This is from alan Johnsons site:

Chrysler-Hemi / Alcohol STG II

These heads are machined from billet 6061 T-6 aluminum, and provide the same air flow characteristics as their Top Fuel cousins. They are the first choice of many Alcohol Dragster and Funny Car teams. They are also very popular with Drag Boats, A-Gas, Nostalgia, and truck and tractor pulling competitors. Must be used with an AJPE supercharger manifold. They are 100% CNC ported, and come fully machined, ready for assembly with 2.400" x 1.950" diameter valves.


Standard Features Include:
100% CNC Porting
3/8" Diameter. Rocker Dowels
9/16" Stud Holes

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Hemi chambered heads like manifold pressure, but normally don't spray well. That being said, this discussion seemed to be about n/a engines. If we are talking about power adders, the Hemi rules the forced induction world completely.

These are only my opinions, your mileage may vary

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If somebody was to go all out they should contact Tim at FHO
He is working on a specially cast head by stage v that flows in the 650cfm range.

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gulp...Thats amazing! Still need to get big cubes, tho..wonder what the BS is..

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If somebody was to go all out they should contact Tim at FHO
He is working on a specially cast head by stage v that flows in the 650cfm range.

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gulp...Thats amazing! Still need to get big cubes, tho..wonder what the BS is..

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4.84 BS
He is looking into getting deck spacers made as nobody is willing to make changes to their blocks.
Tim's like a mad scientist when it comes to making power.

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If somebody was to go all out they should contact Tim at FHO
He is working on a specially cast head by stage v that flows in the 650cfm range.

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gulp...Thats amazing! Still need to get big cubes, tho..wonder what the BS is..

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4.84 BS
He is looking into getting deck spacers made as nobody is willing to make changes to their blocks.
Tim's like a mad scientist when it comes to making power.

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